2851380 has 144 divisors (see below), whose sum is σ = 10343424. Its totient is φ = 622080.

The previous prime is 2851361. The next prime is 2851391. The reversal of 2851380 is 831582.

It is a happy number.

2851380 is a `hidden beast` number, since 285 + 1 + 380 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39024 + ... + 39096.

2^2851380 is an apocalyptic number.

2851380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2851380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5171712).

2851380 is an abundant number, since it is smaller than the sum of its proper divisors (7492044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2851380 is a wasteful number, since it uses less digits than its factorization.

2851380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2851380 is about 1688.6029728743. The cubic root of 2851380 is about 141.8028739977.

The spelling of 2851380 in words is "two million, eight hundred fifty-one thousand, three hundred eighty".